功能(文档预览)：集成 ONLYOFFICE 安全只读预览与工作台体验

新增 ONLYOFFICE 配置签名、内部内容接口、容器编排与反向代理。

打通网页端和桌面端独立预览工作区，完善文档入口、布局及帮助体验。

补充桌面安全发布门禁、开发脚本、使用文档和前后端测试。

frontend/src/styles/main.css

@@ -994,6 +994,64 @@ body {
   border-bottom-color: #26364a;
 }
 
+/* Web workbench edge alignment
+ * Keep page-level spacing consistent with the desktop shell: the route owns
+ * the full main-content canvas while cards and sections own their inner
+ * padding. This also replaces page-specific negative-margin workarounds.
+ */
+@media (min-width: 768px) {
+  .web-layout-container .ctms-route-shell {
+    width: 100%;
+    height: 100%;
+    min-height: 0;
+    box-sizing: border-box;
+  }
+
+  .web-layout-container .ctms-route-shell > * {
+    width: 100%;
+    min-width: 0;
+    min-height: 100%;
+    max-width: none !important;
+    margin: 0 !important;
+    padding: 0 !important;
+    box-sizing: border-box;
+  }
+
+  .web-layout-container .ctms-route-shell > .page,
+  .web-layout-container .ctms-route-shell > .ctms-page,
+  .web-layout-container .ctms-route-shell > .ctms-page-shell,
+  .web-layout-container .ctms-route-shell > .module-page,
+  .web-layout-container .ctms-route-shell > .medical-consult-page {
+    gap: 8px;
+  }
+
+  .web-layout-container .ctms-route-shell .page-inner,
+  .web-layout-container .ctms-route-shell .page-body,
+  .web-layout-container .ctms-route-shell .main-content,
+  .web-layout-container .ctms-route-shell .main-content-card,
+  .web-layout-container .ctms-route-shell .main-content-flat,
+  .web-layout-container .ctms-route-shell .study-home-container,
+  .web-layout-container .ctms-route-shell .overview,
+  .web-layout-container .ctms-route-shell .content-area {
+    min-width: 0;
+    max-width: none;
+    width: 100%;
+    margin-right: 0 !important;
+    margin-left: 0 !important;
+    padding-right: 0 !important;
+    padding-left: 0 !important;
+  }
+
+  .web-layout-container .ctms-route-shell > .page > .table-card,
+  .web-layout-container .ctms-route-shell > .page > .page-inner > .table-card,
+  .web-layout-container .ctms-route-shell > .page.page--flush > .unified-shell,
+  .web-layout-container .ctms-route-shell > .ctms-page-shell.page--flush > .unified-shell {
+    width: 100%;
+    margin: 0 !important;
+    border-radius: 0 !important;
+  }
+}
+
 /* ============================================================
  * 全局弹窗定位修复：弹窗仅显示在主内容区域，不覆盖左侧菜单栏
  * --ctms-sidebar-width 由 Layout.vue 在 body 上动态设置